JSP下载服务器文件的方法

2024-09-05 00:22:24

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这篇文章主要介绍了JSP下载服务器文件的方法,涉及JSP文件传输的相关技巧,具有一定参考借鉴价值,需要的朋友可以参考下

本文实例讲述了JSP下载服务器文件的方法。分享给大家供大家参考，具体如下：

<%@page import="java.io.FileInputStream"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<%@page language="java" contentType="text/html; charset=UTF-8"%>

<%@page import="com.ecc.emp.core.Context" %>

<%@page import="java.io.File" %>

<%@ include file="http://www.xxxx.com/head.jsp"%>

<%

boolean loadFlag = false;

ServletOutputStream ou = null;

FileInputStream fis = null;

try{

Context context=(Context)request.getAttribute("context");

String accountFilePath = (String)context.getDataValue("accountFilePath");

//String accountFilePath ="E:/ComeBack/Acc_BOS_CM/WebContent/upload/product/1336873410414custormerStatement.txt";

//String accountFileName = (String)context.getDataValue("accountFileName");

String displayFileName = (String)context.getDataValue("displayFileName");

//String displayFileName ="custormerStatement.txt";

String fullPath =accountFilePath;

response.reset();

response.setContentType("charset=UTF-8");

response.setContentType("text/HTML");

//response.setContentType("application/vnd.ms-excel");

String filename = new String(displayFileName.getBytes("gb2312"), "ISO8859-1");

response.setHeader("Content-Disposition","attachment; filename=" + filename);

//解决HTTPS不能下载的问题

response.setHeader("Cache-Control","public");

ou = response.getOutputStream();

File file = new File(fullPath);

fis = new FileInputStream(file);

try {

if (fis != null) {

int filelen = fis.available();

byte a[] = new byte[filelen];

fis.read(a);

ou.write(a);

ou.flush();

}

loadFlag=true;

} catch (Exception e) {

System.out.println("Excel is not exist!");

}

out = pageContext.pushBody();

}catch(Exception e){

e.printStackTrace();

}finally{

try {

fis.close();

ou.close();

ou = null;

response.flushBuffer();

} catch (Exception e) {

// TODO 自动生成 catch 块

e.printStackTrace();

}

}

%>